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About Us

Rangaswamy & Associates, Inc. (RAI) headquartered in Louisville, Kentucky, is a Consulting Structural Engineering firm. The firm was organized in 1974 by Thangam Rangaswamy and Calvin Hatfield as Rangaswamy, Hatfield and Associates. In 1987, the firm was reorganized as Rangaswamy and Associates, Inc. In 2016, the company was purchased by Celia and Anthony Ehlers.

We specialize in structural engineering, planning and management consultancy services. We handle small and large scale projects with the same uncompromising principles of integrity and quality. Anthony P Ehlers Jr, PE is a licensed structural engineer with over fifteen years of experience in forensic engineering, structural design and vibration engineering.



  • Structural Engineering
  • Special Inspection
  • Construction Inspection
  • Construction Management
  • Vibration Analysis
  • Computer Aided Design
  • Expert Witness
  • Forensic Analysis
  • Blast Resistant Design


Head Office

The Old Portland Building
539 West Market Street, Suite 200
Louisville, Kentucky 40202, USA
Contact Number : (502) 589-2212
Fax : (502) 589-2240
E-Mail : celia@rangaswamy.com

Overseas Office (India)

Site No.25/26, Thangam House
Phase 3, 5th Cross Street
Rajivgandhi Nagar, Sowripalayam
Coimbatore - 641 028.
Contact Number : (0422) - 4382212, 4382213
E-Mail : apsanandh@rangaswamy.com